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H6 Systems INC

55 Lake St, Nashua, NH 03060

ACTIVELAST SEEN IN FEDERAL DATA AUG 2026 · 2 SOURCES

Operating signal within 12 months from two or more independent sources.

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Homepage of H6 Systems INC
Their homepage, crawled JUL 2026

What they make

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals334515

H6 Systems manufactures tube-based high-power RF transmitters and high-voltage modulators used in susceptibility testing, weather radar, health care, research, and security systems. The company builds systems using magnetrons, klystrons, tetrodes, triodes, and TWTs operating at frequencies from 150 MHz to 40 GHz, and integrates these vacuum tubes with modulators, cavities, PLCs, fault systems, cooling equipment, antennas, positioners, and enclosures to produce custom transmitters.

SUMMARIZED FROM THE COMPANY’S OWN WEBSITE

Where it is

42.75036, -71.46706 · CENSUS TIGER
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Every listed plant in Hillsborough County

Also at this address

No other federal record shares this street address.

WHERE THIS RECORD COMES FROM — 2 FEDERAL SOURCES, 8 FIELDS

Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.

SourceEvidenceFirst seenLast seen
COMPANY SITEOPERATINGJUL 2026AUG 2026
SAM GOVOPERATINGMAR 2026MAR 2026
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
FIELDSOURCESIGNAL
ADDRESS LINE1SAM GOVMAR 2026
CAGE CODESAM GOVMAR 2026
CITYSAM GOVMAR 2026
GEOMCENSUS GEOCODERJUL 2026
NAMESAM GOVMAR 2026
REGISTRATION EXPIRATIONSAM GOVMAR 2026
STATESAM GOVMAR 2026
WEBSITESAM GOVMAR 2026

Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

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